NUR 101 Dosage Calculations (Common Approx Conversions and Rounding Rules) – Flashcards

Unlock all answers in this set

Unlock answers
question
Oral Medications: Scored Tablets
answer
Calculate to the tenth and round to the nearest half tablet: 1.5 tablets = give 1 1/2 tablets 1.7 tablets = give 2 tablets
question
Oral Medications: ALL other oral pills
answer
Calculate to the tenth and round to the whole number: 1.4 tablets = give 1 tablet 1.9 tablets = give 2 tablets
question
Oral Medications: When preparing ORAL LIQUIDS:
answer
Calculate to the hundredth and round to the tenth: 2.32 mL = give 2.3 mL 2.36 mL = give 2.4 mL
question
Injections: When giving more than 1 mL:
answer
calculate to the hundredth and round to the tenth: 1.26 mL = give 1.3 mL 1.38 mL = give 1.4 mL
question
Injections: When giving less than 1 mL:
answer
calculate to the thousandth and round to the hundredth: 0.823 mL = give 0.82 mL 0.666 mL = give 0.67 mL
question
When working with fractions that have repeating decimal:
answer
it is recommended that you leave the fraction intact while working through the problem: 1/6 = 0.16666 -- leave as 1/6 to calculate the problem
question
Body Weight:
answer
Calculate to the hundredth and round to the tenth: 7.35 kg = 7.4 kg
question
Tube Feeding: When calculating calories:
answer
calculate to the tenth and round to the whole number
question
Tube Feeding: When calculating mL/hr:
answer
calculate to the hundredth and round to the tenth
question
IV Problems: When calculating drop factor:
answer
calculate to the tenth and round to the whole number
question
IV Problems: When calculating mg/min, mcg/hr, units/mL, mL/hr:
answer
calculate to the hundredth and round to the tenth
question
IV Problems: When calculating titration factor:
answer
carry out to the thousandth and round off to the nearest hundredth.
question
Type of Medication: Scored Tablets:
answer
round to 1/2 tablet
question
Type of Medication: Oral Pills:
answer
round to whole tablet
question
Type of Medication: Oral Liquids:
answer
round to the tenth
question
Type of Medication: Injections over 1 mL:
answer
round to the tenth
question
Type of Medication: Injection less than 1 mL:
answer
round to the hundredth
question
Body Weight:
answer
round to the tenth
question
Calories:
answer
round to the nearest whole number
question
Tube Feeding mL/hr
answer
round to the nearest tenth
question
Drop factors
answer
round to the whole number
question
mg/min, mcg/hr, units/mL, mL/hr
answer
round to the tenth
question
Volume: Metric: 1 Liter
answer
1L = 1 qt or 32 oz (apothecary) = 1 qt (household)
question
Volume: Metric:
answer
500 mL = 1 pt or 16 oz (apothecary) = 1 pt (household)
question
Volume: Metric: 240 mL
answer
240 mL = 8 oz (apothecary) = 1 glass or 1 measuring cup (household)
question
Volume: Metric: 180 mL
answer
180 mL = 6 oz (apothecary) = 1 cup of coffee
question
Volume: Metric: 30 mL
answer
30 mL = 1 oz or 8 dr (apothecary) = 2 T or 6 t (household)
question
Volume: Metric: 15 mL
answer
15 mL = 0.5 oz or 4 dr (apothecary) = 1 T (household)
question
Volume: Metric: 4 - 5 mL
answer
4 - 5 mL = 1 dr or 60 minims (apothecary) = 1 t (household)
question
Volume: Metric: 1 mL or 1 cc
answer
1 mL or 1 cc = 15 (16) minims (apothecary) = 15 - 16 gtt (household)
question
Weight: Metric: 30 g
answer
30 g = 1 oz (apothecary)
question
Weight: Metric: 15 g
answer
15 g = 4 drams (apothecary)
question
Weight: Metric: 1 g or 1000 mg
answer
1 g or 1000 mg = 15 (16) gr (apothecary)
question
Weight: Metric: 60 (65) mg
answer
1 gr (apothecary)
question
Weight: Metric: 1 mg or 1000mcg
answer
1 mg = .001 g
question
Other: Metric: 1 kg or 1000g
answer
1 kg or 1000 g = 2.2 lbs (apothecary)
question
Other: Metric: 2.54 cm
answer
2.54 cm = 1 in (household)
question
Temperature Conversion: Celsius to Fahrenheit
answer
F = 9/5 C + 32 or (C x 1.8) +32 = F
question
Temperature Conversion: Fahrenheit to Celsius
answer
C = 5/9 (F-32) or (F -32) / 1.8 = C
question
Conversions:
answer
1 g = 1000 mg 1000 mcg = 1 mg 1 kg = 1000 g
question
Gram
answer
The basic unit for weight (solid).
question
Liter
answer
The basic unit for volume (liquid).
question
Meter
answer
The basic unit for length.
question
Kilo
answer
1000 - One thousand times.
question
Hecto
answer
100 - One hundred times.
question
Deka
answer
10 - Ten times.
question
Deci
answer
0.1 - One tenth.
question
Centi
answer
0.01 - One hundredth part of.
question
Milli
answer
0.001 - One thousandth part of.
question
Micro
answer
0.000001 - One millionth part of.
question
g
answer
Gram.
question
mcg
answer
Microgram.
question
mg
answer
Milligram.
question
kg
answer
Kilogram.
question
L
answer
Liter.
question
dL
answer
Deciliter.
question
mL
answer
Milliliter.
question
1 Kilogram (kg)
answer
1000 grams (g)
question
1 gram (g)
answer
1000 milligrams (mg)
question
1 milligram (mg)
answer
1000 micrograms (mcg)
question
1 liter (L)
answer
1000 milliliters (mL)
question
1 milliliter (mL)
answer
0.001 liter (L)
question
1 meter (m)
answer
100 centimeters (cm) = 1000 mm
question
1 millimeter (mm)
answer
0.001 meter (m) = 0.1 cm
question
1 ounce (oz)
answer
30 mL
question
1 tablespoon (T or tbs)
answer
15 mL
question
2 tablespoons (T or tbs)
answer
1 ounce (oz)
question
1 teaspoon (t or tsp)
answer
5 mL
question
1 cup (standard measuring cup)
answer
240 mL (8 ounces)
question
1 pint (pt)
answer
500 mL (16 ounces)
question
1 quart (qt)
answer
1000 mL (32 ounces)
question
15 grains (gr)
answer
1000 mg = 1 gram (g)
question
1 grain (gr)
answer
60 mg
question
2.2 pound (lb)
answer
1 kg (1000 g)
question
1 inch (in)
answer
2.5 cm
question
A patient has been taking 0.5g tablets of acetaminophen (Tylenol) P.O. for postoperative pain after an inguinal hernia repair. If the patient took a total of 1,500 mg in 72 hours, how many 0.5-g tablets were taken?
answer
0.5g: 1 tab :: 1.5g : X tab= 3 tablets
question
The doctor's order reads glyburide 1.5 mg 3 tablets P.O. daily. What's the total dose in milligrams?
answer
X = 4.5 mg
question
Your patient is receiving 500 mg of cefaclor oral suspension. The lable reads cefaclor 250mg/5ml, and the bottle contains 100ml. How many milliliters of cefaclor should you give? ,
answer
x X 250 mg = 5 ml X 500 mg X= 10 ml
question
The doctor orders 0.125 mg of digoxin (Lanoxin) elixir for a patient developing heart failure and pulmonary edema. The bottle is labeled 0.05 mg/ml. How many milliliters should the nurse administer?
answer
0.05 mgX xml = 0.125 mg X 1ml x = 2.5 ml
question
Your patient needs 400 mg of erythromycin oral suspension. the label reads erythromycin 200 mg/ 5 ml. How many milliliters should you give?
answer
x X 200mg = 5 ml X 400 mg x= 10ml
question
The doctor orders 100 mg Dilantin oral suspension t.i.d. for your patient. The label reads Dilantin 125 mg/5ml. How many mililiters should you give?
answer
100 mg X 5 ml = 125 mg X x x= 4ml
question
A doctor orders 25 g of lactulose (Cephulac) for a patient entereing a prehapatic coma. The bottle is labeled 10 g/15ml. How many milliliters should the patient receive?
answer
10 g X xml = 15 ml X 25g X= 37.5
question
Your patients's order reads aspirin gr 10 P.O. daily, but the unit-dose package says aspirin 325 mg. How many tablets should you administer daily?
answer
60 mg X 10 grains = x X 1 grain x X 325 mg = 1 tablet X 600 mg X= 1.846 all probably round to 2
question
A prescriptoin reads phenobarbital gr 1/4 take gr 1/2 t.i.d. P.O. daily. How many milligrams of phenobarbital should this patient receive?
answer
60 mg X grain 1/4 = X x 1 grain X x grain 1/4 = 15mg x 1/2 X= 30 mg
question
Your patient receives a prescription for 62.5 mcg of digoxin elixir P.O. daily. The elixir reads 0.05 mg/ml. How many milliliters of digoxin should you give?
answer
X x 0.05 mg = 1 ml x 0.0625 X= 1.25
question
patient is to receive 0.25 mg of Synthroid. The medication is only available in tablets that contain 125mcg each. How many tablet should the nurse administer?
answer
X = 2 tablets
question
The doctor orders 0.05 mg Synthroid P.O., but the only Synthroid on hand is in tablets that contain 0.025 mg each. How many tablets should you give?
answer
1 tablet X 0.05mg = 0.05 mg X x x= 2 tablets
question
1 liter (L) = ____ ml
answer
1000 milliliters (ml)
question
1 ounce (oz) = ____ ml
answer
30 milliliters (ml)
question
1 ounce (oz) = ____ tbsp
answer
2 tablespoons (tbsp)
question
1 milliliter (ml) = ____ cc
answer
1 cubic centimeter (cc)
question
1 teaspoon (tsp) = ____ ml
answer
5 milliliters (ml)
question
1 tablespoon (tbsp) = ____ ml
answer
15 milliliters (ml)
question
1 tablespoon (tbsp) = ____ tsp
answer
3 teaspoons (tsp)
question
1 gram (g) = ____ mg
answer
1000 milligrams (mg)
question
1 pint = ____ mg
answer
500 milligrams (mg)
question
1 milligram (mg) = ____ mcg
answer
1000 micrograms (mcg)
question
1 kilogram (kg) = ____ g
answer
1000 grams (g)
question
1 kilogram (kg) = ____ lb
answer
2.2 pounds (lb)
question
1 inch (in) (") = ____ cm
answer
2.5 centimeters (cm)
question
8 ounces (oz) = ____ c
answer
1 cup (c)
question
8 ounces (oz) = ____ ml
answer
240 milliliters (ml)
question
grains (gr) X = ____ mg
answer
650 milligrams (mg)
question
grains (gr) V = ____ mg
answer
325 milligrams (mg)
question
240 milliliters (ml) = ___ c
answer
1 cup (c)
question
65 milligrams (mg) = ___ gr
answer
Grains (gr) 1
question
1 dram = ____ ml
answer
4 milliliters (ml)
question
1 coffee cup = ____ oz
answer
6 ounces
question
1 cup = ____ oz
answer
8 ounces
question
1 quart = ____ L
answer
1 liter
question
1 quart = ____ pints
answer
2 pints
question
1 centimeter = ____ mm
answer
10 millimeters
question
1 glass = ____ oz
answer
12 ounces
question
Convert Celsius to Fahrenheit
answer
1. multiply by 1.8 2. add 32
question
Convert Fahrenheit to Celcius
answer
1. subtract 32 2. divide by 1.8
Get an explanation on any task
Get unstuck with the help of our AI assistant in seconds
New